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PostPosted: Tue Jan 13, 2009 10:25 pm 
Joined: Sun Sep 04, 2005 7:48 pm
Posts: 264
Location: Perth, Australia
Hi all,

Not sure if this will help anyone, but i think i have solved my mythbackend segfault issue after upgrading from my old P4/mobo to a much more grunty AMD64 5200 dual processor and mobo.

The story:
I exported the recorded (and other tables) from the old R5.5 backend, and imported them into the fresh R5.5 backend. I noticed that i was getting frequent mythbacken segfault crashes when deleting recordings (after watching etc). The pattern seemed to form that if i deleted a recording from the old P4 box the segfault would occure, but not on new recordings.

The solution (fingers crossed)
The new machine has a new hostname (different to the old P4 box), so i think a simple msql sql update commend to update the hostname field in the recorded table to the new hostname has stopped the crashing/segfaults.

The future
Hopefully this has resolved the problem, i will post back if not.



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 Post subject:
PostPosted: Wed Jan 14, 2009 10:25 am 
Joined: Wed Jan 25, 2006 1:03 pm
Posts: 240
Location: Shakopee, MN USA
The Mythtv wiki has instructions on changing host names here:

Last year when I migrated from R5F27 to R5.5 I used this command below in mysql to update the hostname:

UPDATE recorded SET hostname='newhost',starttime=starttime,endtime=endtime
WHERE hostname='oldhost';

I had a secondary backend / frontend that could not play recordings from the master because the migrated recordings had the old hostname. The command above fixed the issue.

 Post subject:
PostPosted: Thu Jan 15, 2009 9:46 pm 
Joined: Thu Mar 25, 2004 11:00 am
Posts: 9551
Location: Arlington, MA
I've also posted a script which makes the substitutions in the DB for things like recordings and such.


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